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Overview
The Mannesmann Rexroth 2FRE 6B-21/16LMV is a direct-operated pressure relief valve engineered for precise system protection in hydraulic circuits. The 2FRE series represents Rexroth’s proven design for cost-effective overpressure control in industrial and mobile applications. This used unit has been inspected and is suitable for replacement in existing systems requiring reliable pressure regulation.
Key Features
- Direct-operated relief valve design for straightforward, maintenance-friendly operation
- Compact form factor suitable for manifold and line-mounted installation
- Adjustable pressure setting via integral adjustment mechanism
- Proven Rexroth/Bosch build quality and durability in industrial service
- SAE and ISO flange compatibility for standard hydraulic connections
Technical Specifications
- Manufacturer: Mannesmann Rexroth (Bosch Rexroth)
- Model Number: 2FRE 6B-21/16LMV
- Valve Type: Direct-operated pressure relief valve
- Series: 2FRE
- Nominal Size: 6B (NG 6 / CETOP-05)
- Adjustment Type: Manual via integral screw adjustment
- Medium: Mineral oil and compatible hydraulic fluids
- Operating Temperature Range: -10°C to +60°C (typical for industrial duty)
- Housing Material: Ductile iron or ductile cast iron
- Mounting: ISO 4401 (CETOP-05) cavity or sandwich mounting
Typical Applications
- Overpressure protection in hydraulic pump circuits
- System pressure limiting in industrial machinery and equipment
- Mobile hydraulic applications (construction, agricultural equipment)
- Pressure relief in manifold-mounted hydraulic systems
- Pilot stage valve in larger compound relief valve systems
Compatibility & Replacements
Compatible With
- ISO 4401 (CETOP-05) NG6 cavity mounting systems
- Standard SAE and ISO manifold blocks
- Mineral oil hydraulic systems
- Industrial and mobile hydraulic equipment
- Bosch Rexroth and third-party pump/motor assemblies
Replaces / Drop-In Replacement For
Verify the exact model and cavity designation with your system integrator or OEM documentation before ordering. The 2FRE 6B series is a standard NG6-cavity relief valve; confirm that the pressure setting, flow capacity, and port configuration match your original valve. Do not assume interchangeability without technical verification.
Works With
- Bosch Rexroth hydraulic system components
- ISO 4401 standard manifold assemblies
- Open-loop hydraulic circuits with gravity or pump return
- Accumulator charging circuits for pressure protection
- Industrial automation and material handling hydraulic systems
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